The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2005
Filed:
Apr. 24, 2003
Yoshiomi Hamano, Yamatokoriyama, JP;
Kiyoshi Inoue, Nara, JP;
Junichi Kajiwara, Nara, JP;
Takao Horiuchi, Nara, JP;
Koichi Sumida, Tenri, JP;
Akira Tamagaki, Nara, JP;
Akihiko Taniguchi, Yamatokoriyama, JP;
Hiroki Kai, Yamatokoriyama, JP;
Yoshiomi Hamano, Yamatokoriyama, JP;
Kiyoshi Inoue, Nara, JP;
Junichi Kajiwara, Nara, JP;
Takao Horiuchi, Nara, JP;
Koichi Sumida, Tenri, JP;
Akira Tamagaki, Nara, JP;
Akihiko Taniguchi, Yamatokoriyama, JP;
Hiroki Kai, Yamatokoriyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A power supply deviceincluding: a current sourcefor supplying current to a load circuitwhich operates on the supplied current, and a power switch unitbetween the current sourceand the load circuitto control passage of current, wherein: the power switch unitincludes a switching elementconnected in parallel with the open-close element, a power supply controllerincluding an open-close element controllerwhich controls operation of the open-close elementand a switching element controllerwhich controls operation of the switching element, and a voltage detectorwhich detects terminal voltage of the load circuit; and the power switch unitturns on the switching element before supplying current to the load circuit and closes the open-close element when the terminal voltage of the load circuit becomes almost equal to supply voltage.